GNU bug report logs - #25265
make-thread crashes in OS X 10.6

Previous Next

Full log

Message #74 received at 25265 <at> debbugs.gnu.org (full text, mbox):

From: Alan Third <alan <at> idiocy.org>
To: "Charles A. Roelli" <charles <at> aurox.ch>
Cc: 25265 <at> debbugs.gnu.org
Subject: Re: bug#25265: make-thread crashes in OS X 10.6
Date: Tue, 2 May 2017 21:49:35 +0100

[Message part 1 (text/plain, inline)]

On Sat, Dec 24, 2016 at 12:06:45PM +0100, Charles A. Roelli wrote:
> Running Emacs -Q on the latest commit (e36a3882),
> 
> M-: (make-thread (lambda () "string"))
> 
> appears to hang Emacs immediately.

I’ve been working on this on and off for a while now, and I just can’t
fix it.

I’ve attached two patches that together are the best I’ve managed to
achieve, but unfortunately it randomly freezes up with 100% CPU usage.

I’ve not yet managed to work out what it’s doing when it goes into the
100% CPU loop. I can only assume I’ve missed some crucial case in
ns_select or something.

The first patch stops the NS port from using SIGIO, as it seems to be
the source of a number of problems. The second removes the NS event
loop in ns_select as it requires block_input/unblock_input wrapped
around it, but that’s what’s causing the crash in make-thread.

Instead it just looks for whether there is a new NS event as I don’t
think that requires blocking input.

-- 
Alan Third

[0001-Don-t-use-SIGIO-in-NS.patch (text/plain, attachment)]

[0001-Remove-event-loop-from-ns_select.patch (text/plain, attachment)]

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.